We propose 50ks observation of an accretion powered pulsar 4U 1626-67. Theprimary purpose is to study the variability of the emission lines as a functionof pulse phase during the current spin-up era. Our pulse phase resolvedspectroscopy of previous XMM-Newton observation during spin-down era revealedpulse phase dependence of the O-VII line at 0.568 keV by factor of virgul4. Weinterpret that these variations are due to warps in the inner accretion discinduced by radiation pressure which is also believed to be the cause forspin-down. It is expected to show different line variability pattern during thespin-up phase which we aim to study. We will also do time resolved spectroscopyto study the behaviour of these low energy emission lines during the flares
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2015-10-05T15:34:04Z/2015-10-06T07:47:24Z
Version
17.56_20190403_1200
Mission Description
The European Space Agencys (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESAs second cornerstone of the Horizon 2000 Science Programme. It carries 3 high throughput X-ray telescopes with an unprecedented effective area, and an optical monitor, the first flown on a X-ray observatory. The large collecting area and ability to make long uninterrupted exposures provide highly sensitive observations. Since Earths atmosphere blocks out all X-rays, only a telescope in space can detect and study celestial X-ray sources. The XMM-Newton mission is helping scientists to solve a number of cosmic mysteries, ranging from the enigmatic black holes to the origins of the Universe itself. Observing time on XMM-Newton is being made available to the scientific community, applying for observational periods on a competitive basis.
European Space Agency, Prof Biswajit Paul, 2016, 'Pulse Phase Resolved Spectroscopy of 4U 1626-67 during the spin-up era', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-fyr2xuw
